Added a flow control blocked notification message.

net/spdy/spdy_framer.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_SPDY_SPDY_FRAMER_H_
 #define NET_SPDY_SPDY_FRAMER_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 422 matching lines @@
   SpdySerializedFrame* SerializeWindowUpdate(
       const SpdyWindowUpdateIR& window_update) const;
 
   // Creates and serializes a CREDENTIAL frame.  The CREDENTIAL
   // frame is used to send a client certificate to the server when
   // request more than one origin are sent over the same SPDY session.
   SpdyFrame* CreateCredentialFrame(const SpdyCredential& credential) const;
   SpdySerializedFrame* SerializeCredential(
       const SpdyCredentialIR& credential) const;
 
-  // Serializes a BLOCKED frame. The BLOCKED frame is used to indicate to the
-  // remote endpoint that this endpoint believes itself to be flow-control
-  // blocked but otherwise ready to send data. The BLOCKED frame is purely
-  // advisory and optional.
+  // Creates and serializes a BLOCKED frame. The BLOCKED frame is used to
+  // indicate to the remote endpoint that this endpoint believes itself to be
+  // flow-control blocked but otherwise ready to send data. The BLOCKED frame
+  // is purely advisory and optional.
+  SpdyFrame* CreateBlocked(SpdyStreamId stream_id);
   SpdySerializedFrame* SerializeBlocked(const SpdyBlockedIR& blocked) const;
 
   // Creates and serializes a PUSH_PROMISE frame. The PUSH_PROMISE frame is used
   // to inform the client that it will be receiving an additional stream
   // in response to the original request. The frame includes synthesized
   // headers to explain the upcoming data.
   SpdyFrame* CreatePushPromise(SpdyStreamId stream_id,
                                SpdyStreamId promised_stream_id,
                                const SpdyHeaderBlock* headers);
   SpdySerializedFrame* SerializePushPromise(
@@ skipping 247 matching lines @@
   // starts with HTTP.  If it does, we likely have an HTTP response.   This
   // isn't guaranteed though: we could have gotten a settings frame and then
   // corrupt data that just looks like HTTP, but deterministic checking requires
   // a lot more state.
   bool probable_http_response_;
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_SPDY_FRAMER_H_